It looks a lot like my white's stoll when she had a protazoan infection... that's all.
She had very poor digestion (even with appropriately sized crickets). Her stool always had pieces of crickets and some mucous. NEver solid.
Are you using anew vitamin or calcium? It could be a reaction to that?
I just always feel that it's so inexpensive to check a fecal, that it should be done if never done before...
Just my opinion, of course